What is the difference between trans and cis interactions during cell-cell adhesion respectively?

#Question id: 10791

#Unit 6. System Physiology – Plant

Following are certain statements regarding furanocoumarins;

 a) furanocoumarins have an attached furan ring

 b) These compounds are toxic until they are activated by sunlight in the ultraviolet A (UV-A) region (320–400 nm)  

 c) Light activated furanocoumarins can insert themselves into the double helix of DNA and bind to the pyrimidine bases, thus blocking transcription and repair and leading eventually to cell death   

 d) Phototoxic furanocoumarins are especially abundant in members of the Umbelliferae family, including celery, parsnip, and parsley.

 Which of the following combination from the above statements is correct?

#Question id: 24550

#Unit 9. Diversity of Life Forms

Only four possible states of a particular site in a DNA sequence, which of the following statement is correct?

#Question id: 26841

#Unit 10. Ecological Principles

Ecologists have often partitioned the overall species diversity of a region into different components given in figure;

A-Overall differences 

B- overall richness of the region

C- Local site richness

Select the correct match

#Question id: 12837

#Unit 2. Cellular Organization

#Question id: 9282

#Unit 6. System Physiology – Plant

The rate of photosynthesis when red and far-red light are given together is greater than the sum of the rates when they are given apart, the effect provided essential

evidence in favor of the concept that photosynthesis is carried out by two photochemical systems working in tandem but with slightly different wavelength optima

this effect is known as